Features: Replacement of Parts# ARA330610; Hard-anodized colour, CNC machined PTFE-coated hardened alloy 6061-T6; The lightweight aluminum alloy material is durable and improves the overall performance of the shock absorber; Aside from the great looks, aluminum alloy will not flex as much as plastic under stress or during high ambient temperatures; Oil filled type, oil not filled in the factory. Length adjustable. Specification: Compatible with: Brand Name: Arrma 8s Kraton(rear), Arrma 8s Outcast(front and rear), Item Number: ARA5810, ARA110002 Material: Aluminum Alloy Package Include: Alloy front/rear shock absorber 2 pieces, remark: Arrma 8s Kraton(rear), Arrma 8s Outcast(front and rear) Note: Check your specific model's manual for compatibility,or Contact us.